Right side shaft spins freely, left side spins but feels like something is jammed up so i plugged batteries in and with no wheels on throttled up. at low rpm the one that feels jammed does not spin, but at higher rpm it will spin..
open up your diff, you probably have a stripped spider gears.
humay has left the building, peace.
nope after tearing apart there was a small set screw just getting thrown around and causing it to jam up every now and then... how it got there completely beats me, cause never had it apart before